Filter-press.



P. 1'. WAGNER.

FILTER PRESS.

APPLIGATION FILED MAY 9, 1913.

Patented Dec. 1, 1914.

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' FILTER PRESS.

APPLICATION FILED MAY 9, 1913.

. Patented Dec. 1,-1914,

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FREDEBIC WAGNER, OF SANTA ANA, CALIFORNIA.

FILTER-PRESS.

Application filed May 9, 1913. Serial No. 766,483.

To all whom it may concern:

Be it known that I, Fnnoninc J. WncNER, a citizen of the United States,resid ng at Santa Ana, in the county of Orange and State of California,have invented a new and useful Improvement in F ilter-Presses, of whichthe following is a specification.

This invention relates to filter presses, and

the principal object is to provide a filtering press having a continuousoperation with a plurality of conveyer means.

It is also an object to provide a filter press with a continuousconveyer and means to hold the filtered material in positive relationthereto while subjected to a succession of filterlng processes.

It is also an object to provide a continuous filter press with a casinghaving a plurality of filtering chambers separated by pressure packingboxes, so that the material is prevented from escaping at the points ofintroduction of the endless conveyer.

It is also a further object to provide means for cleaning the c'ombinedconveyer elements together with means to ad ust .the tension of thecooperating conveyers independently.

In the drawings accompanying this specification and. forming therewiththe application for Letters Patent, Figure 1 is a sectional elevation ofthe apparatus, portions of the structure being shown in side elevation.Fig. 2 is a plan view, parts of the conveyer being broken away on itsupper por-' the line 8-8 of Fig. 1. Fig. 9 isa detail.

perspective of the middle link of the conveyer chain. Fig. 10 is adetail perspective view of one of the connecting bars.

More specifically in the drawings, 11 and 12 designate the longitudinalside frames of the machine, provided with the end frame 14, in whichisjournaled one end of the drive shaft 15, provided with the idler anddriving pulleys 16. Mounted adjacent the drive shaft 15, andtransversely of the frame, is the shaft 17, on which is secured the drum18, provided with suitable flanges to retain and support at this end ofthe machine the Specification of Letters Patent.

"the drum being keyed to the shaft 3l,which Patented Dec. 1, 119141.

endless chain 19. To 'eachend of the drum are secured gear wheels 20,which are adapted to mesh with gear wheels 21 of the same diametermounted on the drum 22 which is provided with a shaft 23, the two drumsbeing in parallel relation and so journaled in the frame that they aredriven at the same speed. To provide means for driving these drums andthe conveyers supported thereon, connections are interposed between thedrive shaft 15 and the drum 18, which are preferably shown as a worm 24meshing in a large worm wheel 25 keyed to the shaft 17 of the drum 18.The drum 22 is adapted to carry and support one end of the conveyer belt26-, the opposite ends of this belt being supported and carried aroundthe drum 27, which is provided with a shaft 28 carriedin the slidingbearings 29, suitable flanges being provided on this drum, so that thebelt is properly guided thereon. The endless chain 19 is also carriedover a second drum 30 provided with suitable flanges,

is mounted in suitable sliding journals 32, the two drums at this end ofthe machine being so disposed that the outer surfaces of chain and beltare brought together intermediate of the two drums.

To slide the journals 29 and 32 so that proper tension may be placedupon the con veyer belt chain, threaded shafts 33 are provided, whichare secured to thejournals in any well known manner, their outer endsextending through and engaging in the treaded blocks 34 and terminatingin handles or hand-wheels 35, so that by turning the latter, thethreaded shaft connected to the journals, will be moved in relation tothe end frame and provide for wear, and maintain a suitable tension onthe conveyer belt and chain. The drums 18 and 22 are also so disposedthat the belt is brought in contact with the lower portion of theconveyer 100 chain, the drum 18 being preferably driven clockwise sothat the chain travels in the drawing from left to right, or the upperportion travels from drum 18 to drum 30,

the travel through the casing forming the 105 is supported by the sideframes 11 inter- 11 mediate of the adjacent pairs of rolls andpreferably occupying a-horizontal position.

mitt

The first section of the casing consisting of a packing box having asliding and adjustable closure l1 therefor, provided with packing ringsor plates 42 of any suitable material. These packing rings or plates areforced in contact with the outer face of the steam or pressure box :3through which the belt and chain also travel. This pressure box is of ageneral rectangular configuration provided with an apertured cover M,the space inclosed thereby being of somewhat greater vertical heightthan the combined height of the belt and chain supported on the floor ofthe box. lhe pressure pipe 45 is led into the aperture in the top plate,and the pressure is exerted upon the plate 46 which acts as a pistonmovably mounted within the box so that the belt and chain aresulliciently held in contact at this point to prevent the escape of thematerial. to be filtered through this box. The plate 46 is alsopreferably provided with an aperture 47' which communicates with atranverse groove 48, this latter being provided to allow a certainamount of the pressure medium, which is usually and preferably steam, toescape to and around the chain and belt.

The next section of the casing is directly connected to the steam box 43by means of suitable flanged ends, and is formed prefer ably of twohopper shaped castings t9 and 50, through which the chain and belt areadapted to freely slide, the belt resting upon the horizontally disposedscreen plate 51 forming an efficient support for the belt, but notpreventing the escape of fluids therethrough, this plate being supportedupon horizontalflanges 52 and held thereto by means of the plates 53suitably secured to the side of the lower section of the casing,

the chamber inclosed thereby being adapted to receive the material to befiltered through the aperture 54:, an exit being provided for thefiltrate through the aperture 55.

The next section of the casing is a steam boa: 56 similar inconstruction to the lJOX 43, but without a packing box, pressure appliedat this point being slightly greater than the pressure maintained on theprodnot. to be filtered, introduced into the previous chamber described.

The next section of the casing is preferably of greater 'length than thefirst described, but is of similar construction, having two aperturedhoppers 57 and 58 .supporting the screened plate 60, this chamber beinradapted more articula-rl' for the D 1 l each engagement in the filteringcasing, and:

to elliciently remove those portions of the cake which cling to thelatter, washing chambers are provided, that for the chain being mountedover the central portion, consisting of a box 63 having an aperturedcover 64s. The chain as it enters this boir is suitably supported upon aroller 65, placed adjacent the opening into the box, a similar roller 66being provided adjacent the exit opening for the chain, so that the longstretch between the rolls is properly sup ported, and frictioneliminated as the chain enters and makes its exit from the washing box.[in inlet pipe 67 connects avith the aperture in the cover, and asuitable outlet 68 is provided in the floor of the boX.

A similar washing box 69 is provided for the belt, having a cover 'ZO;the inlet and outlet in this box being preferably through the belt atthis point, which forms a support for the cake as the belt passesthrough the filtering casing, the inlet being desig nated 71 and outlettherefor 72.

' The cake normally falls from the belt as the latter turns around thedrum 22 into a suitable conveyor or hopper, not shown, and to assistthis action and remove the more adherent materials, a cylindrical. brush73 is provided mounted on a shaft 74, which is driven by a belt or chain75 carried over a pulley 76 on the shaft 23 the brush being so arrangedthat it is revolved against the movement of the belt, and brushes ofi'all adherent particles previous to the Washing of the belt in the box 69The belt is formed, of an endless fabric of suitable thickness to permitthe passage of the fluid carrying the filtrate; the chain being ofnovel. construction and formed of a plurality of parallel disposed links77, intermediate of which are preferably placed one or more of a. seriesof links 78, which are provided with hubs 79. llhe links 77 only havehubs on their inner faces, the outer faces being plain, and adapted toform contact with the sides of the filtering casing and the washing box.lhe hubs 79 are slotted in two planes, the longitudinal plane having aslot 80 which is adapted to receive the tongue 81 formed on theoppositely disposed end of a link of the same configurationpvhich isadapted to be hinged within the hub by means of binge pin 82. Slots cutin the end of the hub at right angles to the slot 86 form seats for thetongue 84lformed on the ends of the spacing sleeves 83; these sleevesbeing adapted to fit closely to the pin 82 carried through the hubs onlid the links and engage with their tongues 84,

the grooves 85in the hub 79 to form the transverse walls of a pocketadapted to receive the cake, the links forming the end walls, and thebelt the fioor of this cake pocket.

Hinge pins 82 are shown as plain pins which may be secured in anysuitable manner to the end links, so that a smooth face is formed on theouter edges of the chain, and provide an easy fit in the walls of thefiltering casing.

In the operation of this machine, power being applied to the drivepulley on the shaft 15, the belt and chain are slowly advanced inadjacent position through the filtel-ing casing, and the product to befiltered,

taking for illustration the solution of saccharine material in theprocesses of preparing sugar from beets or cane together with the largeproportion of silicate or milkof lime, is introduced into the firstchamber of the casing where all of the insoluble por tions are caughtupon the floor formed by the belt which is intimately pressed in contactwith the screened plate 51, the filtrate carrying the sugar in solutionescapes through the orifice 55 to any suitable container. The belt nowadvances through the pressure box 56, the speed being so timed that thecakes resultant from the filtering process practically fill the pocketsin the chain, and the cake is exposed to the action of water introducedthrough the inlet-in the casing 57 where all of the undi'ssolved sugaris carried out, the pressure of the dissolving medium being preferablyslightly greater than that in the first filtering chamber, but not inexcess of that applied to the pressure boi: 56 and 61. In travelingthrough the latter chamber, all the soluble ingredients are eliminatedand the resultant cake consisting of calcined carbonates together withsand, and other contaminating ingredients commonly found with the limewhen introduced in the process, fall off of the belt, or are removed bythe brush 73, and any particles which may become embedded in the fabric,are washed out inthe washing box 69. Particles adhering to the roll alsofall by gravity, the drum 18 being preferably placed in the positionbeyond the drum 22 so that this action is assisted by this extension ofthe chain in a horizontal position beyond the belt, the

chain being supported and washed in the washing box 63 provided for it,the current of the fluid passing through the pockets formed by the linksand the sleeves.

What I claim is:

1. A filter press, comprising a closed filtration chamber having inletsand outlets, a movable filtering medium passing through said chamber,means to move said medium through said chamber, and means mounted onsaid chamber to prevent the escape of material from said chamber at thepoints,

where the filtering medium enters and leaves said chamber. v

2.. A filter press, comprising a closed filtration chamber divided intoa plurality of compartments each of said compartments having inlets andoutlets, an endless 'belt' carrying filtering medium mounted on saidchamber, means to rotate said belt and filtration.

3. A filter press, comprising a supporting frame, an endless chain beltmounted thereon, an-endless belt mounted adjacent to said chain belt,means to contact engaging portions of said belt and said chain belt, andan apertured casing surrounding saidcontacted portion .of said belt andchain belt.

4. A filter press, comprising a supporting frame, drivin frame, aplurality of supporting rolls mounted adjacent said driving means, anendless chain belt carried by a pair of said rolls, an endless fabricbelt carried by'a pair of said rolls, said fabric belt and chain beltadapted to contact intermediate of their rolls, a casing forming aplurality of chambers inclosing said contacting portion of said fabricbelt'and chain belt, and packing means to segregate chambers in saidcasing.

5. A filter press, comprising a supporting frame, an upper and lowerpair of supporting rolls, an endless chain belt carried .by the upper ofsaid pairs of rolls, an endless fabric belt carried by the lower pairof'said ing rolls, an endless chain belt carried by the upper of saidpair's of rolls, an endless fabric belt carried by the lower pair ofsaid rolls, a casing forming a plurality ofchambers arranged to inclosethe adjacent and contacting portions of said belts, means to wash saidbelts independently of each other, brush means adapted to engage saidfabric belt, means to drive said belts in unison, and means to adjusteach of said pairs of rollers to increase or diminish the tension onsaid belts.

. 7 A filter press, comprising a supporting frame, driving means mountedon said frame, a plurality of supporting rolls mounted adjacent saiddriving means, an endless chain belt carried by a pair of said rolls, anendless fabric belt carried .by a

means mounted on said pair of said rells, said fabric belt and'chain InWitness that I claim the foregoing 1 bolt adapted to contact mtermedlate01' then" have hereunto subscrlbed my name thls 51th rolls, a easlng'l'ornnng a plumhty of chzunday of A'pnl, 1913.

bers inclosing said contacting porticn of 1B HEDERIC J. WAGNER. saidfabric belt and chain belt, am} aper- Witnesses:

cured means to support Said contacting p01? WV. P KEENE,

tions Within said casing. MAME BATTEY.

